This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

video playback problems

  • 2 replies
  • 1 has this problem
  • 3 views
  • Last reply by taskbee

taskbee
taskbee
more options

In youtube fullscreen the video has a glitch... it flashes black every ten seconds or so..

In youtube fullscreen the video has a glitch... it flashes black every ten seconds or so..

All Replies (2)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem.

  • Switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Appearance
  • Do NOT click the "Refresh Firefox" button on the Safe Mode start window
taskbee
taskbee Question owner
more options

Still have the same issue after trying all suggested? This is a new MacBook Pro... Any other suggestions? This must be a known issue... must be a work around.. ??